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Psicologia: Reflexão e Crítica
On-line version ISSN 1678-7153
SANTOS, Natanael Antonio dos; FRANCA, Valtenice and SIMAS, Maria Lucia de Bustamante. Radial frequency contrast sensitivity in children of 4 to 7 years old and adults. Psicol. Reflex. Crit. [online]. 2008, vol.21, n.1, pp. 28-32. ISSN 1678-7153. http://dx.doi.org/10.1590/S0102-79722008000100004.
The aim of this work was to measure contrast sensitivity for radial frequencies (rCSF) in the range between 0.25-2 cpd in children (4 to 7 years of age) and young adults. Contrast thresholds were estimated for 25 participants (twenty children and five adults) using the psychophysical forced-choice method at low luminance levels. All the cts participants had normal acuity. The results showed that the curves (rCSF) of the 4, 5, 6 and 7 years old improved significantly with age. The results also showed that the rCSF for 7 year old children was lower than in young adults. These results suggest that the development of contrast sensitivity for radial stimuli increases gradually even after turning 7 years old.
Keywords : Contrast sensitivity; visual development; children; radial frequency; forced-choice method.